﻿function Marquee() {
    this.ID = document.getElementById(arguments[0]);
    if (!this.ID) {
        alert("您要设置的\"" + arguments[0] + "\"初始化错误\r\n请检查标签ID设置是否正确!");
        this.ID = -1;
        return;
    }
    this.Direction = this.Width = this.Height = this.DelayTime = this.WaitTime = this.CTL = this.StartID = this.Stop = this.MouseOver = 0;
    this.Step = 1;
    this.Timer = 30;
    this.DirectionArray = {
        "top": 0,
        "up": 0,
        "bottom": 1,
        "down": 1,
        "left": 2,
        "right": 3
    };
    if (typeof arguments[1] == "number" || typeof arguments[1] == "string") this.Direction = arguments[1];
    if (typeof arguments[2] == "number") this.Step = arguments[2];
    if (typeof arguments[3] == "number") this.Width = arguments[3];
    if (typeof arguments[4] == "number") this.Height = arguments[4];
    if (typeof arguments[5] == "number") this.Timer = arguments[5];
    if (typeof arguments[6] == "number") this.DelayTime = arguments[6];
    if (typeof arguments[7] == "number") this.WaitTime = arguments[7];
    if (typeof arguments[8] == "number") this.ScrollStep = arguments[8];
    this.ID.style.overflow = this.ID.style.overflowX = this.ID.style.overflowY = "hidden";    
    this.ID.noWrap = true;
    this.IsNotOpera = (navigator.userAgent.toLowerCase().indexOf("opera") == -1);
    if (arguments.length >= 7) this.Start();
}
Marquee.prototype.Start = function () {
    if (this.ID == -1) return;
    if (this.WaitTime < 800) this.WaitTime = 800;
    if (this.Timer < 20) this.Timer = 20;
    if (this.Width == 0) this.Width = parseInt(this.ID.style.width);
    if (this.Height == 0) this.Height = parseInt(this.ID.style.height);
    if (typeof this.Direction == "string") this.Direction = this.DirectionArray[this.Direction.toString().toLowerCase()];
    this.HalfWidth = Math.round(this.Width / 2);
    this.HalfHeight = Math.round(this.Height / 2);
    this.BakStep = this.Step;
    this.ID.style.width = this.Width + "px";
    this.ID.style.height = this.Height + "px";
    if (typeof this.ScrollStep != "number") this.ScrollStep = this.Direction > 1 ? this.Width : this.Height;
    var templateLeft = "<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;display:inline;'><tr><td noWrap=true style='white-space:nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td><td noWrap=true style='white-space: nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td></tr></table>";
    var templateTop = "<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;'><tr><td>MSCLASS_TEMP_HTML</td></tr><tr><td>MSCLASS_TEMP_HTML</td></tr></table>";
    var msobj = this;
    msobj.tempHTML = msobj.ID.innerHTML;
    if (msobj.Direction <= 1) {
        msobj.ID.innerHTML = templateTop.replace(/MSCLASS_TEMP_HTML/g, msobj.ID.innerHTML);
    }
    else {
        if (msobj.ScrollStep == 0 && msobj.DelayTime == 0) {
            msobj.ID.innerHTML += msobj.ID.innerHTML;
        }
        else {
            msobj.ID.innerHTML = templateLeft.replace(/MSCLASS_TEMP_HTML/g, msobj.ID.innerHTML);
        }
    }
    var timer = this.Timer;
    var delaytime = this.DelayTime;
    var waittime = this.WaitTime;
    msobj.StartID = function () {
        msobj.Scroll()
    }
    msobj.Continue = function () {
        if (msobj.MouseOver == 1) {
            setTimeout(msobj.Continue, delaytime);
        }
        else {
            clearInterval(msobj.TimerID);
            msobj.CTL = msobj.Stop = 0;
            msobj.TimerID = setInterval(msobj.StartID, timer);
        }
    }
    msobj.Pause = function () {
        msobj.Stop = 1;
        clearInterval(msobj.TimerID);
        setTimeout(msobj.Continue, delaytime);
    }
    msobj.Begin = function () {
        msobj.ClientScroll = msobj.Direction > 1 ? msobj.ID.scrollWidth / 2 : msobj.ID.scrollHeight / 2;
        if ((msobj.Direction <= 1 && msobj.ClientScroll <= msobj.Height + msobj.Step) || (msobj.Direction > 1 && msobj.ClientScroll <= msobj.Width + msobj.Step)) {
            msobj.ID.innerHTML = msobj.tempHTML;
            delete (msobj.tempHTML);
            return;
        }
        delete (msobj.tempHTML);
        msobj.TimerID = setInterval(msobj.StartID, timer);
        if (msobj.ScrollStep < 0) return;
        msobj.ID.onmousemove = function (event) {
            if (msobj.ScrollStep == 0 && msobj.Direction > 1) {
                var event = event || window.event;
                if (window.event) {
                    if (msobj.IsNotOpera) {
                        msobj.EventLeft = event.srcElement.id == msobj.ID.id ? event.offsetX - msobj.ID.scrollLeft : event.srcElement.offsetLeft - msobj.ID.scrollLeft + event.offsetX;
                    }
                    else {
                        msobj.ScrollStep = null;
                        return;
                    }
                }
                else {
                    msobj.EventLeft = event.layerX - msobj.ID.scrollLeft;
                }
                msobj.Direction = msobj.EventLeft > msobj.HalfWidth ? 3 : 2;
                msobj.AbsCenter = Math.abs(msobj.HalfWidth - msobj.EventLeft);
                msobj.Step = Math.round(msobj.AbsCenter * (msobj.BakStep * 2) / msobj.HalfWidth);
            }
        }
        msobj.ID.onmouseover = function () {
            if (msobj.ScrollStep == 0) return;
            msobj.MouseOver = 1;
            clearInterval(msobj.TimerID);
        }
        msobj.ID.onmouseout = function () {
            if (msobj.ScrollStep == 0) {
                if (msobj.Step == 0) msobj.Step = 1;
                return;
            }
            msobj.MouseOver = 0;
            if (msobj.Stop == 0) {
                clearInterval(msobj.TimerID);
                msobj.TimerID = setInterval(msobj.StartID, timer);
            }
        }
    }
    setTimeout(msobj.Begin, waittime);
}
Marquee.prototype.Destory = function () {
    clearInterval(this.TimerID);
    this.ID.onmouseover = null;
    this.ID.onmouseout = null;
    this.ID.scrollTop = 0;
}
Marquee.prototype.Scroll = function () {
    switch (this.Direction) {
        case 0:
            this.CTL += this.Step;
            if (this.CTL >= this.ScrollStep && this.DelayTime > 0) {
                this.ID.scrollTop += this.ScrollStep + this.Step - this.CTL;
                this.Pause();
                return;
            }
            else {
                if (this.ID.scrollTop >= this.ClientScroll) {
                    this.ID.scrollTop -= this.ClientScroll;
                }
                this.ID.scrollTop += this.Step;
            }
            break;
        case 1:
            this.CTL += this.Step;
            if (this.CTL >= this.ScrollStep && this.DelayTime > 0) {
                this.ID.scrollTop -= this.ScrollStep + this.Step - this.CTL;
                this.Pause();
                return;
            }
            else {
                if (this.ID.scrollTop <= 0) {
                    this.ID.scrollTop += this.ClientScroll;
                }
                this.ID.scrollTop -= this.Step;
            }
            break;
        case 2:
            this.CTL += this.Step;
            if (this.CTL >= this.ScrollStep && this.DelayTime > 0) {
                this.ID.scrollLeft += this.ScrollStep + this.Step - this.CTL;
                this.Pause();
                return;
            }
            else {
                if (this.ID.scrollLeft >= this.ClientScroll) {
                    this.ID.scrollLeft -= this.ClientScroll;
                }
                this.ID.scrollLeft += this.Step;
            }
            break;
        case 3:
            this.CTL += this.Step;
            if (this.CTL >= this.ScrollStep && this.DelayTime > 0) {
                this.ID.scrollLeft -= this.ScrollStep + this.Step - this.CTL;
                this.Pause();
                return;
            }
            else {
                if (this.ID.scrollLeft <= 0) {
                    this.ID.scrollLeft += this.ClientScroll;
                }
                this.ID.scrollLeft -= this.Step;
            }
            break;
    }
}